Hi Rosemary:

You will definitely want to take a look at the following items.

Florida’s Black Public Officials / Google Books
http://books.google.com/books?id=_1iRfGqI2LAC&pg=PA122&dq=w+w+sampson+florida#v=onepage&q=sampson&f=false

Laborers in the Vineyard of the Lord / Google Books
http://books.google.com/books?id=wf62FaIi2e4C&pg=PA136&dq=%22william+w+sampson%22+florida&lr=#v=snippet&q=sampson&f=false

Heritage Quest

Record 1:
William Sampson
Applicant surname: Alston
Branch State: NY
Application Year: 1872
Where Born: Warrenton, NC

Record 2:
William Chestnut, Tallahassee, Application Year: 1867